If the area of circle is 144cm2, then the area of its quadrant is ________
144cm2
12cm2
72cm2
36cm2
A polygon in which each interior angle is less than 180o, is called __________ polygon.
Concave
Convex
irregular
None of these
The number of quadrants in a circle is
1
2
3
4
A polygon in which at least one angle is more than 180o is called a ___________
Concave polygon
Convex polygon
irregular polygon
A rectilinear figure of four sides is called _________
Penlagon
Hexagon
Triangle
Quadrilateral
If the area of a semicircle is 84cm2 , then the area of the circle is _________
42cm2
168cm2
288cm2
Perimeter of a semicircle is ________
2r units
If the radius of a circle is 7m, then the area of the semi circle is
77m2
44m2
88m2
154m2